Browser
https://play.riftforge.me/client/
The public door and the play client both live on https://play.riftforge.me/ — that is the host with a working certificate.
Telnet / Mudlet
Official package: MortalsAndMonsters.mpackage. Point Mudlet at that host and port.
Discord
OOC hall, not the game.
Once you are in
Type help. Screen reader: config screenreader.
Found a problem: bug. Got an idea: suggest.